Pharmacokinetic analysis of dynamic (18)F-Fluoromisonidazole PET data in non-small cell lung cancer Journal Article

Authors: Schwartz, J.; Grkovski, M.; Rimner, A.; Schöder, H.; Zanzonico, P. B.; Carlin, S. D.; Staton, K. D.; Humm, J. L.; Nehmeh, S. A.
Article Title: Pharmacokinetic analysis of dynamic (18)F-Fluoromisonidazole PET data in non-small cell lung cancer
Abstract: Hypoxic tumors exhibit increased resistance to radiation, chemical, and immune therapies. 18F-fluoromisonidazole (18F-FMISO) PET is a noninvasive, quantitative imaging technique used to evaluate the magnitude and spatial distribution of tumor hypoxia. In this study, pharmacokinetic analysis (PKA) of 18F-FMISO dynamic PET extended to 3 h after injection is reported for the first time, to our knowledge, in stage III-IV non-small cell lung cancer (NSCLC) patients. Methods: Sixteen patients diagnosed with NSCLC underwent 2 PET/CT scans (1-3 d apart) before radiation therapy: a 3-min static 18F-FDG and a dynamic 18F-FMISO scan lasting 168 6 15 min. The latter data were acquired in 3 serial PET/CT dynamic imaging sessions, registered with each other and analyzed using pharmacokinetic modeling software. PKA was performed using a 2-tissue, 3-compartment irreversible model, and kinetic parameters were estimated for the volumes of interest determined using coregistered 18F-FDG images for both the volume of interest-averaged and the voxelwise time-activity curves for each patient's lesions, normal lung, and muscle. Results: We derived average values of 18F-FMISO kinetic parameters for NSCLC lesions as well as for normal lung and muscle. We also investigated the correlation between the trapping rate (k3) and delivery rate (K1), influx rate (Ki) constants, and tissue-to-blood activity concentration ratios (TBRs) for all tissues. Lesions had trapping rates 1.6 times larger, on average, than those of normal lung and 4.4 times larger than those in muscle. Additionally, for almost all cases, k3 and Ki had a significant strong correlation for all tissue types. The TBR-k3 correlation was less straightforward, showing a moderate to strong correlation for only 41% of lesions. Finally, K1-k3 voxelwise correlations for tumors were varied, but negative for 76% of lesions, globally exhibiting a weak inverse relationship (average R520.23 6 0.39). However, both normal tissue types exhibited significant positive correlations for more than 60% of patients, with 41% having moderate to strong correlations (R . 0.5). Conclusion: All lesions showed distinct 18F-FMISO uptake. Variable 18F-FMISO delivery was observed across lesions, as indicated by the variable values of the kinetic rate constant K1. Except for 3 cases, some degree of hypoxia was apparent in all lesions based on their nonzero k3 values. © 2017 by the Society of Nuclear Medicine and Molecular Imaging.
Keywords: hypoxia; non-small cell lung cancer; 18f-fluoromisonidazole; pharmacokinetic analysis; compartmental analysis
Journal Title: Journal of Nuclear Medicine
Volume: 58
Issue: 6
ISSN: 0161-5505
Publisher: Society of Nuclear Medicine  
Date Published: 2017-06-01
Start Page: 911
End Page: 919
Language: English
DOI: 10.2967/jnumed.116.180422
PROVIDER: scopus
PMCID: PMC5450365
PUBMED: 28232611
Notes: Article -- Export Date: 3 July 2017 -- Source: Scopus
Citation Impact
MSK Authors
  1. Heiko Schoder
    336 Schoder
  2. Andreas Rimner
    324 Rimner
  3. John Laurence Humm
    366 Humm
  4. Pat B Zanzonico
    282 Zanzonico
  5. Sean Denis Carlin
    83 Carlin
  6. Kevin David Staton
    10 Staton